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This commit is contained in:
Camille GILLOT 2022-03-13 23:13:58 +01:00
parent d3b7ea6c9e
commit c8c691ff88
1 changed files with 5 additions and 9 deletions
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14
compiler/rustc_ast_lowering/src/lib.rs
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@ -129,19 +129,15 @@ struct LoweringContext<'a, 'hir: 'a> {
/// written at all (e.g., `&T` or `std::cell::Ref<T>`). /// written at all (e.g., `&T` or `std::cell::Ref<T>`).
anonymous_lifetime_mode: AnonymousLifetimeMode, anonymous_lifetime_mode: AnonymousLifetimeMode,
/// Used to create lifetime definitions from in-band lifetime usages. /// Used to create lifetime definitions for anonymous lifetimes.
/// e.g., `fn foo(x: &'x u8) -> &'x u8` to `fn foo<'x>(x: &'x u8) -> &'x u8` /// When an anonymous lifetime is encountered in a function or impl header and
/// When a named lifetime is encountered in a function or impl header and /// requires to create a fresh lifetime parameter, it is added
/// has not been defined
/// (i.e., it doesn't appear in the in_scope_lifetimes list), it is added
/// to this list. The results of this list are then added to the list of /// to this list. The results of this list are then added to the list of
/// lifetime definitions in the corresponding impl or function generics. /// lifetime definitions in the corresponding impl or function generics.
lifetimes_to_define: Vec<(Span, NodeId)>, lifetimes_to_define: Vec<(Span, NodeId)>,
/// `true` if in-band lifetimes are being collected. This is used to /// If anonymous lifetimes are being collected, this field holds the parent
/// indicate whether or not we're in a place where new lifetimes will result /// `LocalDefId` to create the fresh lifetime parameters' `LocalDefId`.
/// in in-band lifetime definitions, such a function or an impl header,
/// including implicit lifetimes from `impl_header_lifetime_elision`.
is_collecting_anonymous_lifetimes: Option<LocalDefId>, is_collecting_anonymous_lifetimes: Option<LocalDefId>,
/// Currently in-scope lifetimes defined in impl headers, fn headers, or HRTB. /// Currently in-scope lifetimes defined in impl headers, fn headers, or HRTB.